Thin organic films on mica surfaces are important nanocomposites widely used as additives in various polymers to enhance mechanical and thermal properties of the resulting composite materials. The interaction  between those nanocomposites with the polymer matrices and between themselves is not yet well understood. Having some experimental data from DSC (differential scanning calorimetry), X-Ray diffraction, and NMR, we try to model the time evolution of the nanocomposite structure alone with a multiscale simulation. The mineral platelets are treated as fixed unit with a certain surface potential, and the organic residues are modelled atomistically. From the treatment at different temperatures, the DSC data are tried to be reproduced, and structural parameters of the system are being investigated. We hope to realistically simulate the observed phase transition, and to establish a theoretical treatment.